When United States Post Office planes took to the skies in the 1920s, they had their own version of the roadway's yellow line. A series of giant concrete arrows and gaslight beacons helped point the way from New York to San Francisco.

From demo-ware to humor-ware to hardware in a couple of days, the fabled Manila case for the MacBook Air is now for real. Dubbed AirMail, handmade in vinyl and fleece-lined to protect your precious laptop, it even comes with that cutesy red tie at no extra cost. Of course, you could argue that designers Jona Bechtolt…